Blood in 5 week old daughter's stool.

The doctor wants me to start using half special formula and half breastmilk. This is the last thing I want to do!! They think it could be an allergy to dairy in my diet. I've done so much research and cut out dairy, soy, and eggs so far. I've also read it could be a foremilk and hindmilk imbalance. Does anyone have any experience with this type of situation?? I've been to the GI specialist and I feel like she talked to me in circles and just pushed the formula. Can I get help from a lactation consultant for this issue??? Any help is greatly appreciated! Thanks!!